Air-gap malware: https://en.wikipedia.org/wiki/Air-gap_malware
Some Blue LEDs contain sapphire, which is apparently macrostate entangleable.
Some Blue LEDs contain sapphire, which is apparently macrostate entangleable.
I’ve studied quantum cryptography rather extensively, and I have no idea what you’re trying to say.
You could have a power LED that contains an actual magical quantum computer running attacker controlled software and with unlimited entanglement with the attacker, and it would not have a qualitatively greater ability to exfiltrate information to the attacker than a plain old LED would have. At best you would get a bandwidth increase by a small constant factor, improved tolerance to noise, and the ability to prevent anyone else from decoding the transmission.
From "Experiment demonstrates continuously operating optical fiber made of thin air" (2023) https://news.ycombinator.com/item?id=35812168 :
> Electrons turn piece of wire into laser-like light source" (2022) https://news.ycombinator.com/item?id=33490730
> What is also remarkable: Plane electromagnetic waves like a light beam normally cannot cause permanent velocity changes of electrons in vacuum, because the total energy and the total momentum of the massive electron and a zero rest mass light particle (photon) cannot be conserved. However, having two photons simultaneously in a wave traveling slower than the speed of light solves this problem (Kapitza-Dirac effect).
> For Peter Baum, physics professor and head of the Light and Matter Group at the University of Konstanz, these results are still clearly basic research, but he emphasizes the great potential for future research: "If a material is hit by two of our short pulses at a variable time interval, the first pulse can trigger a change and the second pulse can be used for observation—similar to the flash of a camera."
Chirped Pulse Amplification: https://en.wikipedia.org/wiki/Chirped_pulse_amplification
What Hz rate is necessary to do CPA Chirped Pulse Amplification with laser, or with a [blue] LED? FWIU lasers have a repetition rate between 0.1Hz and 1Mhz, and a pulse width between 1 picosecond and 1 millisecond?
Looks like there are already commercial LED CPA systems.
Aren't there also weird signal effects with e.g. PWM and a blue led connected to a Pi with a sufficient clock rate? What are the maximum binary data transmission distances for [blue] LEDs?
How to fade an LED in and out when you can only vary 5volts on and off? PWM: Pulse Width Modulation; you vary the duty cycle:
PWM: https://en.wikipedia.org/wiki/Pulse-width_modulation
"Learn PWM signal using Wokwi Logic Analyzer" https://blog.wokwi.com/explore-pwm-with-logic-analyzer/
Wokwi > New (Pi Pico w/ Micropython) LED project: https://wokwi.com/projects/300504213470839309